Daily air quality is measured by the air quality index (AQI) reported by the Environmental Protection Agency.
pm25_2011_durham
A data frame with 449 observations on the following 20 variables.
Date
a factor with levels 37-063-0015
a numeric vector
a numeric vector
a factor with levels ug/m3 LC
a numeric vector
a numeric vector
a numeric vector
a numeric vector
a factor with levels Acceptable PM2.5 AQI & Speciation Mass
PM2.5 - Local Conditions
a numeric vector
a factor with levels Raleigh-Durham-Cary, NC
a numeric vector
a factor with levels Durham, NC
a numeric vector
a factor with levels North Carolina
a numeric vector
a factor with levels Durham
a numeric vector
a numeric vector